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Finding the Fourth Proportional to 9,503.40, 14,279.40 and 8,434.20

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Solution

The fourth proportional to 9,503.40, 14,279.40 and 8,434.20 is: 12,672.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,503.40 : 14,279.40 = 8,434.20 : x
  2. Step 2: Convert to fraction form
    9,503.40/14,279.40 = 8,434.20/x
  3. Step 3: Cross multiply
    9,503.40x = 14,279.40 × 8,434.20
  4. Step 4: Simplify right side
    9,503.40x = 120,435,315.48
  5. Step 5: Solve for x
    x = 120,435,315.48/9,503.40
  6. Step 6: Final answer
    x = 12,672.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.